Sunday: I sent an email to a potential PhD supervisor.
Sunday 4pm: he responded asking me to call him tomorrow .
Monday 11am: I responded yes and asked if there's a preferred time.
Tuesday 1am: he emailed me back asking for my number and said he will try calling me on Tuesday.
Tuesday 8am: I responded with my cell and said there are two hours when I wouldn't be available but otherwise i would be happy to chat anytime.
Tuesday 5pm: still no call. So I sent an email to say I'm available rest of today and tomorrow.
I realized now that when he asked me to call him tomorrow on Sunday, I responded in email on Monday to ask for a time instead of calling on Monday... he was kind to have responded on Tuesday and said he will try calling me. But I still have not heard from him.
Should I email or call him today?